A system for enabling competition entry is provided using a printed product label provided on a product item. The system has a sensing device, computer system and display device. The sensing device senses coded data from the label attached to the product item and generates interaction data representing...http://www.google.fr/patents/US7823769?utm_source=gb-gplus-shareBrevet US7823769 - System for enabling competition entry and display via label
System for enabling competition entry and display via label
